-er a-a a-b aaa aab aad aae aah aak aan aar ab- aba abb abd abe abh abk abn abr ad- ada adb add ade adh adk adn adr aea aeb aed aee aeh aek aen aer aha ahb ahd ahe ahh ahk ahn ahr aka akb akd ake akh akk akn akr an- ana anb and ane anh ank ann anr ar- ara arb ard are arh ark arn arr baa bab bad bae bah bak ban bar bba bbb bbd bbe bbh bbk bbn bbr bda bdb bdd bde bdh bdk bdr be- bea beb bed bee beh bek ben ber bha bhb bhd bhe bhh bhk bhr bka bkb bke bkk bkn bkr bna bnb bnd bne bnk bnn bnr bra brb brd bre brh brk brn brr daa dab dad dae dah dak dan dar dba dbb dbd dbe dbh dbk dbn dbr dda ddb ddd dde ddh ddk ddn ddr de- dea deb ded dee deh dek den der dh- dha dhb dhd dhe dhh dhk dhr dka dkb dke dkk dkr dna dnb dnd dne dnh dnk dnn dnr dra drb drd dre drk drn drr eaa eab ead eae eah eak ean ear eba ebb ebd ebe ebh ebk ebn ebr ed- eda edb edd ede edh edk edn edr eea eeb eed eee eek een eer eha ehb ehd ehe ehh ehn ehr eka ekb ekd eke ekh ekr en- ena enb end ene enh enk enn enr era erb erd ere erh erk ern err haa hab had hae hah hak han har hba hbb hbd hbe hbh hbk hbn hbr hda hdb hdd hde hdh hdk hdn hdr he- hea heb hed hee heh hek hen her hha hhb hhd hhe hhh hhk hhn hhr hka hkb hkd hkh hkk hkn hkr hna hnb hnd hne hnh hnk hnn hr- hra hrb hrd hre hrh hrk hrn hrr ka- kaa kab kad kae kah kak kan kar kba kbb kbd kbe kbh kbk kbn kbr kda kdb kde kdh kdk kdr ke- kea keb ked kee keh kek ken ker kha khe khh khk khn khr kkb kke kkh kkk kkn kkr kn- kna knd kne knk knn knr kra krd krk krn krr naa nab nad nae nah nak nan nar nba nbb nbd nbe nbk nbn nbr nda ndb ndd nde ndh ndk ndn ndr ne- nea neb ned nee neh nek nen ner nha nhb nhd nhe nhh nhk nhn nhr nka nke nkk nkn nkr nna nnb nne nnh nnk nnn nra nrb nrd nre nrk nrn nrr ra- raa rab rad rae rah rak ran rar rba rbb rbd rbe rbh rbk rbn rbr rda rdb rdd rde rdh rdn rdr re- rea reb red ree reh rek ren rer rh- rha rhb rhd rhe rhh rhn rhr rkb rke rkk rna rnb rnd rnh rnn rnr rra rrb rrd rrh rrk rrn rrr